Power driven hand tools



Nov. 20, 1956 B. cs. METOFF POWER DRIVEN HAND TOOLS 4 Sheets-Sheet 1Filed Sept. 14, 1955 INYENTOR BORIS G, METOFF ATTORNEY Nov. 20, 1956 B.G. METOFF POWER DRIVEN HAND TOOLS IQINVENTOR 4 Sheets-Sheet 2 R M/m 4Filed Sept. 14, 1955 BORIS G. METOFF ATTORNEY Nov. 20, 1956 B. e. METOFF2,

POWER DRIVEN HAND TOOLS Filed Sept. 14, 1955 4 Sheets-Sheet 5 INVENTOR.'BORIS G. METOFF BYWW ATTORNEY Nov. 20, 1956 B. G. METOFF 2,771,105

POWER DRIVEN HAND TOOLS Filed Sept. 14, 1955 FIG-I2 INVENTOR. BORIS G.METOFF ATTORNEY United States Patent POWER DRIVEN HAND TOOLS Boris G.Metolf, Dallas, Tex., assignor to Rotex Company, Dallas, Tex., acorporation of Texas Application September 14, 1955, Serial No. 534,217

12 Claims. (Cl. 144-117) This invention relates in general to powerdriven hand tools and, more particularly, to a planer and jointerattachment for so-called electric hand-saws.

It is the primary object of the present invention to provide a planerand jointer attachment which can be coupled or mounted upon a powerhand-saw to provide a power driven plane capable of performing all thewoodworking functions of a conventional hand plane and also adapted forattachment to a work-bench or similar stationary support, in whichposition it will be capable of performing the functions of a jointer.

It is also an object of the present invention to provide a planer andjointer attachment of the type stated which can be quickly andaccurately attached to the power handsaw with which it is to beassociated.

It is a further object of the present invention to provide a planer andjointer attachment which is provided with a unique type of chip disposalarrangement and will not clog up readily.

It is an additional object of the present invention to provide a planerand jointer attachment which incorporates a novel, convenient, andhighly precise depth-of-cut controlling mechanism.

With the above and other objects in view, my invention resides in thenovel features of form, construction, arrangement and combination ofparts presently described and pointed out in the claims.

In the accompanying drawings:

Figure 1 is a perspective View of a planer and jointer attachmentconstructed in accordance with and embodying the present invention, andshowing such attachment in operative association with a power hand-sawfrom which the blade and guard have been removed;-

Figures 2, 3, and 4 are side elevational, top plan, and end elevationalviews, respectively, of the planer and jointer attachment;

Figures 5 and 6 are sectional views taken along lines 5-5 and 6-6,respectively, of Figure 3;

7 Figures 7 and 8 are sectional views taken along lines 7-7- and 8-8,respectively of Figure 2;

Figure 9 is a sectional view taken along line 9-9 of Figure 7;

Figure 10 is a sectional view taken along line 1010 of Figure 2;

Figure 11 is a fragmentary exploded-perspective view of the depth-of-cutmechanism forming a part of the present invention; and

Figure 12 is a side elevational view of the planer and jointerattachment in association with a bench-mounting fixture by which thedevice can be used as a jointer.

Referring now in more detail and by reference characters to thedrawings, which illustrate a preferred embodiment of the presentinvention, A designates a power handsaw, of more or less conventionaldesign, including a housing generally designated h enclosing an electricmotor 1 which is provided with a shaft 2, a removable handle 3, and asole-plate 4. The usual circular saw blade and blade guard have beenremoved and hence are not shown.

2,771,105 Patented Nov. 20, 1956 Provided for use with the hand-saw A isa planer and jointer attachment B, which comprises a body-casting 5having a flat top face 6, side faces 7, 8, an inclined rear face 9, andan arcuate front face 10, the latter being beveled across its topmargin, as at 11, and provided with a centrally located fiat-faced boss12 for alternatively receiving the handle 13 or the stand-attachmentbolt 14. The body-casting 5 isprovided in its rear half with a flatunder face 15 upon which the entire device slides when it is being usedfor planing purposes. In its forward end, the body-casting 5 is coredout to provide an open-bottomed box-like recess 16 having a forward face17, rear face 18, side faces 19, 20, and a flat top wall 21 which isintegrally provided with a downwardly opening tubular post 22. The frontface 10 of the body-casting 5 and the forward face 17 of the recess 16define a front wall 23 which is indented along its bottom margin toprovide a guide slot 24 having end-stops 25, 25. Rearwardly of therecess 16, the body-casting 5 is also cored out to provide a somewhatcylindrical transverse cutter chamber 26, which is separated from therecess by a partition wall 27 and is closed at one lateral end by abearing plate 28 which is secured to the body casting 5 by screws 29 andis provided with a bearing 30 in coaxial alignment with a bearing 31mounted in the body-casting 5 at the opposite end of the cutter chamber26 for supporting a cutter shaft 32 having a cutter body 33 andremovable cutter blades 34, 34. The shaft 32 furthermore extendsoutwardly through the bearing 30 and is provided with a pulley 35, allas best seen in Figure 2 and for purposes presently more fullyappearing.

The substantially solid rear half of the body-casting 5 is also coredout to provide an arcuate chip-discharge throat 36 which opens at itsforward end upon the rear face 37 of the cutter chamber 26 and opens atits rear end upon the side face 7 of the body-casting 5. It should benoted that the chip-discharge throat 36 curves smoothly and becomesprogressively wider from front to rear in a rather unique manner, withthe result that chips and shavings coming away from the cutter-blades34, 34, are efiiciently blown out to one side, thereby avoiding cloggingor interference with the effective operation of the tool.

Disposed across the open bottom of the recess 16, and, in effect,forming a closure therefor, is a shoe 38 having a flat under face 39integrally provided with an upwardly extending guide-sleeve 40 shapedfor snug-fitting slidable disposition upon the tubular post 22. Milledaxially into the sleeve 22 are two diametrally opposite holes 41, 41',for engagement with endwise aligned guide-pins 42, 42', mounted in thebody-casting 5 and projecting into the recess 16. Disposed flatwise uponthe upwardly presented face of the shoe 38 is a somewhat diamond-shapedadjustment lever 43 which is centrally provided with a centrally locatedcircular aperture 44 sized for snug-fitting rotative disposition uponthe guide-sleeve 40. The diamond-shaped adjustment lever 43 is alsoprovided with two diametrally opposite, curved cars 45 having cammingslots 45 adapted for operative engagement with the guide-pins 42, 42.The adjustment lever 43 is also provided with arcuate slots 46, 46',concentric with the aperture 44 and extending snugly, but slidably,therethrough are studs 47, 47 respectively, by which the adjustmentlever 43 is operatively secured to the shoe 38. and adjustment lever 43is an indexing plate 48 which is rigidly fastened to the shoe 38 and hasan arcuate segment of radial corrugations or teeth 49 for engagementwith a single matching corrugation or tooth 50 formed on the under sideof the adjustment lever 43 whereby to hold the latter in any one of aplurality of positions between the limits of its movement. Theadjustment lever 43- furthermore projects forwardly through the guideslot 24 and is provided with an upstanding tongue 51 havingforwardlyInterposed between the shoe 38' extending cars 52, 52, which maybe-manually gripped.

whereby to swing the adjustment lever 43 from side to side. Preferably,the tongue 51 is provided with a V- shaped notch which is aligned with ascale s engraved, embossed, or otherwise imprinted upon the-frontfaceofthe bodycasting 5. As Will-be evident from the/drawings and theforegoing description, the adjustment lever 43 may bemanually swung fromside to side and the cammingslots 45, will cause the shoefifi to-shiftupand down with respect to the recess 16, thereby varying the relativeperpendicular distance between the planes of the under face 39 and theunder face 15 so as Ioeffect suitable adjustment in the depth-of-cut ofthe tool. It will also'be noted by reference to Figure 11- that the-shoe38 is provided along its rear transverse margin with an upwardlyprojecting sealforming flap 53 which may be made of any suitableresilient material, such as spring steel, rubber, or the like, andserves to keep chips or sawdust from blowing into the recess 16 to anyappreciable extent. Furthermore, the forward margin of the shoe 38 ispreferably curved slightly upwardly, as at 54, to facilitate feeding thetool into the work.

Rigidly mounted in the body-casting 5 toward the forward'end thereof isan upstanding threaded stud which is fitted with a wing-nut 56 andwasher 57. Provided for co-operation with the stud 55- is a U'shapedfastening clip 58 having a forward leg 59 and a rear leg 60 connected bya fiat bight 61 which is slotted for loose-fitting disposition upon thestud S5 beneath the washer 57 and wing-nut 56. The rear leg 60 isslightly shorter than the forward leg 59 so as to bear down in tightlyclamped engagement with the forward portion of the sole-plate 4 whichforms a conventional part of the usual housing h of the power hand-sawA. Also rigidly mounted in the body-casting 5 toward the rear endthereof is a second upstanding threaded stud 62 which is fitted with awingnut 63 and washer 64 for tightening down a somewhat wedge-shapedclamping block 65 having forwardly extending arms 66, 66, adapted tobear against the rear portion of the sole-plate 4. As will be seen fromFigure 3, the arms 66, 66', project laterally beyond the side faces 7',8, of the body-casting 5 to straddle the sole-plate 4. and bearthereagainst at Widely spaced areas, forming a somewhat triangularrelationship with the contact-area under the forward fastening clip 58,thereby producing an unusually secure and stable juncture between thepower hand-saw A and the attachment B.

The shaft 2 of the power hand-saw A is provided with a conventionaldrive pulley 67 which is operatively connected to the pulley 35 by aV-belt 68 whereby the shaft 32 and its associated cutter-blades may berotated when the motor of the hand-saw A is energized.

Bolted or otherwise removably fastened to the side face 8 of thebody-casting 5 are laterally projecting hinge brackets 69, 69', havinghinge-pins 7t), 70, respectively,

which support hinge-plates 71, 71. Welded or otherwise rigidly securedto the hinge-plates 71, 71, and extending lengthwise therebetween is afence 72 which projects below, and to one side of, the under faces 15,39, whereby to guide the tool by bearing slidably against a lateral faceof the work. In order to permit the cutting of bevels, the hinge-plates71, 71, are provided with arcuate slots 73, 73', respectively, and thehinge-plates are correspondingly provided with threaded studs 74, 74',projecting loosely therethrough and being fitted with wing-nuts 75,

75', and washers 76, 76', so that the angular-planar relationshipbetween the fence '72 and the under faces 15, 3?, may be suitablyadjusted.

Provided for optional use with the planer and jointer attachment B is abench stand C formed preferably from heavy-gauge sheet metal andintegrally including upstanding legs 77, 78, connected by a flatbase-plate 79. At their upper ends, the legs 77, 78 are suitably bentover and formed to fit retentively against the front face 10 and rearface 9 of. the body-casting 5. The planer and jointer attachment. Bismounted in the bench stand byv removing the handle 13 and insertingthebolt 14 through an aperture X provided in the leg 77. The rear face 9 isprovided with a removable bolt 80 and washer 81 which can similarly beremoved and reinserted through an aperture Y provided in the leg 78,allas best seen in Figure 12. It should be noted that, for thispurpose, the handle 3 of the power hand-saw is removed and: thebase-plate 79 clamped or fastened by any other conventional means to awork-bench, table, or other similar support. In such position, the toolmay be used as a jointer.

It shouldbe understood that changes andmodifications in the form,construction, arrangement, and combination of the several parts of thepower driven hand tool may be made and substituted for those hereinshown and described without departing from the nature and principle ofmy invention.

Having thus described my invention, what I claim and desire to secure byLetters Patent is:

1. For use with a power driven hand tool' having a housing, an-electricmotor and a shaft; 21 jointer and planer attachment comprising abody-member having a downwardly opening transverse chamber, a cutteroperatively mounted in the chamber, means for operatively connecting thecutter to the shaft, a work-contacting shoe adjustably mounted on thebody-member, and means for detachably securing the body-member to thehousing.

2. For use with a power driven hand tool having a housing, an electricmotor and a shaft; '3. jointer and'planer attachment comprising abody-member having a downwardly opening transverse chamber, a cutteroperatively mounted in the chamber, means for operatively connecting thecutter to the shaft, a work-contacting shoe adjustably mounted on thebody-memb er, and clamping means for detachably securing the body-memberto the housing. 3. For use with a power driven hand tool having ahousing, an electric motor and a shaft; a jointer and planer attachmentcomprising a body-member having a downwardly opening transverse chamber,a fluted cutter operatively mounted in the chamber, means foroperatively connecting the cutter to the shaft, a work-contacting shoeadjustably mounted on the body-member, and means for detachably securingthe body-member to the housing.

4. For use with a power driven hand tool having a housing, an electricmotor and a shaft; a jointer and planer attachment comprising abody-member having'a downwardly opening transverse chamber, a cutteroperatively mounted in the chamber, means for operatively connecting thecutter to the shaft, said body-member having a curved passageway formedtherein rearwardly of, and opening at its forward end into, the chamber,said passageway opening at its rear end onto one lateral face of thebody-member, a work-contacting shoe adjustably mounted on thebody-member, and means for detachably securing the body-member to thehousing.

5. For use with a power driven hand tool having a I housing, an electricmotor and a shaft; ajointer and planer attachment comprising abody-member having a downwardly opening transverse chamber, a cutteroperatively mounted in the chamber, means for operatively connecting thecutter to the shaft, said body-member having a curved passageway formedtherein rearwardly' of, and opening at its forward end into, thechamber, said passageway having continuously increasing cross-sectionalarea in the rearward direction and opening at its rear end onto onelateral face of the body-member, a work-contacting shoe adjustablymounted on the body-member, and means for detachably securing thebody-member to the housing.

6. For use with a power driven hand tool'having a housing, an electricmotor and a shaft; a jointer and'planer atjustably mounted on thebody-member, means for de- MA r tachably securing the body-member to thehousing, and means for optional engagement with the body-member wherebythe body-member and housing can be inverted when in assembled relationso that the cutter and workcontacting shoe will be presented upwardly asin a jointer.

7. For use with a power driven hand tool having a housing, an electricmotor and a shaft; a jointer and planer attachment comprising abody-member having a downwardly opening transverse chamber, a cutteroperatively mounted in the chamber, means for operatively connecting thecutter to the shaft, said body-member also being provided with arelatively large open-bottomed recess located forwardly with respect tothe chamber, a workcontaeting shoe shiftably mounted in the recess andextending closurewise across the open bottom thereof, and an adjustmentlever operatively mounted in the recess for shifting the shoe to variousadjusted positions between the limits of its travel.

8. For use with a power driven hand tool having a housing, an electricmotor and a shaft; a jointer and planer attachment comprising abody-member having a downwardly opening transverse chamber, a cutteroperatively mounted in the chamber, means for operatively connecting thecutter to the shaft, said body-member also being provided with arelatively large open-bottom recess located forwardly with respect tothe chamber, a workcontacting shoe shiftably mounted in the recess andextending closurewise across the open bottom thereof, and an adjustmentlever operatively mounted in the recess and having a manipulating handleprojecting forwardly from the forward end of the body-member between theshoe and the body-member, said lever being adapted for shifting the shoeto various adjusted positions between the limits of its travel.

9. For use with a power driven hand tool having a housing, an electricmotor and a shaft; a jointer and planer attachment comprising abody-member having a downwardly opening transverse chamber, a cutteroperatively mounted in the chamber, means for operatively connecting thecutter to the shaft, said body-member being provided with a rectilinearopen-bottomed recess located forwardly of the chamber, a slide-formingmember disposed centrally of the recess and projecting downwardlytherefrom, a flat-bottomed rectangular shoe disposed closurewise acrossthe open bottom of the recess and having an inwardly extending elementslidably engaged with the slide-forming member, and a lever mounted overthe inner face of the shoe in substantially parallel relation theretoand being pivoted around the slide-forming member, and camming meansoperatively associated with the lever for shifting the shoe toward andaway from the recess.

10. For use with a power driven hand tool having a housing, an electricmotor and a shaft; a jointer and planer attachment comprising abody-member having a downwardly opening transverse chamber, a cutteroperatively mounted in the chamber, means for operatively connecting thecutter to the shaft, said body-member being provided with a rectilinearopen-bottomed recess located forwardly of the chamber, a slide-formingmember disposed centrally of the recess and projecting downwardlytherefrom, a fiat-bottomed rectangular shoe disposed closurewise acrossthe open bottom of the recess and having an inwardly extending elementslidably engaged with the slide-forming member, and a lever mountedrockably upon the inner face of the shoe in substantially parallelrelation thereto and being pivoted around the slide-forming member, andcamming means operatively associated with the lever for shifting theshoe toward and away from the recess.

11. For use with a power driven hand tool having a housing, an electricmotor and a shaft; a jointer and planer attachment comprising abody-member having a downwardly opening transverse chamber, a cutteroperatively mounted in the chamber, means for operatively connecting thecutter to the shaft, said body-member being provided with a rectilinearopen-bottomed recess located forwardly of the chamber, a slide-formingmember disposed centrally of the recess and projecting downwardlytherefrom, a flat-bottomed rectangular shoe disposed closurewise acrossthe open bottom of the recess and having an inwardly extending elementslidably engaged with the slide-forming member, and a lever mountedrockably upon the inner face of the shoe in substantially parallelrelation thereto and being pivoted around the slide-forming member,upstanding ears formed on the lever, said ears having angularlypositioned camming slots, and stationary pins fixed in and projectinginwardly from the body-member into the recess, said pins having endportions slidably engaged in said camming slots so that as the lever isrocked to-and-fro the shoe will be shifted toward and away from therecess.

12. For use with a power driven hand tool having a housing, an electricmotor and a shaft; a jointer and planer attachment comprising abody-member having a downwardly opening transverse chamber, a cutteroperatively mounted in the chamber, means for operatively connecting thecutter to the shaft, said body-member being provided with a rectilinearopen-bottomed recess located forwardly of the chamber, a slide-formingmember disposed centrally of the recess and projecting downwardlytherefrom, a flat-bottomed rectangular shoe disposed closurewise acrossthe open bottom of the recess and having an inwardly extending elementslidably engaged with the slide-forming member, and a lever mountedrockably upon the inner face of the shoe in substantially parallelrelation thereto and being pivoted around the slide-forming member,upstanding ears formed on the lever, said ears having angularlypositioned camming slots, stationary pins fixed in and projectinginwardly from the body-member into the recess, said pins having endportions slidably engaged in said camming slots so that as the lever isrocked to-and-fro the shoe will be shifted toward and away from therecess, and means disposed across the rear end of the shoe between theshoe and the lower rear margin of the recess for barring the directentry of sawdust and shavings into the recess from the chamber in whichthe cutter is located.

No references cited.

